Improvement in laying concrete pavements



L at intervals,

. that the JESSE W. SN'YDER, OF4 CHICAGO, ILLINOIS.

IMPROVEMENT IN LAYING CONCRETE PAVEMENTS.

Specification forming part of Letters Patent No. 139,272, dated May 27, 1873; application filed i March 15, 1873.

To all whom it may concern:

Be it known that I, JEssE W. SNYDEE, of Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement'in Concrete Pavements; and I do declare that the following is a true and accurate description thereof:

resents the same in section.

Description of Iron Frame-Work.

The frame-work consists of iron, threesixteentlis of an inch in thickness, more or less, by two inches broad, and beveled nearly sharp on the under edge, beyond which, ext-end sharp beveled points, which are stuck part Way in the ground for the purpose of holding the frame n position, and also leaving a space intervening between the ground and frame, so division of the concrete may only extend half-way through. I then ll in with concrete until the frame-work is full, when it Fig. 4. showsa cross-section of is troweled 0E and the frame withdrawn, thus giving to the pavement the appearance of being laid in blocks, leaving the` spaces, which run half-way through the palgnent, to be filled Witliws'd'bwif''tlestable material.

My object in running bility to crack (from frost coming out of the ground) in anyplace other than its weakest.

part, which'is along the lines a, in Fig. 1,

where'th'e frame-work hasbeen withdrawn.

Claim.

What I claim `as new, and desire to secure by Letters Patent, is`" The method of laying concrete pavements,

by molding the concrete, nrconnecton with an iron frame having cross-bars with beveled i projections on their under sides, which extend halt` way through the concrete, so that when the frame is withdrawn V-shaped grooves will be left in the concrete, to be iilled with sand or other analogous material, in the manner and for the purpose specified.

JESSEW.SNYDER.

Witnesses:

O. A. LEEMEN, F. J. LosKAY.

the frame-work halfway through the concrete is to lessen its lia-` 

